83891601 has 12 divisors (see below), whose sum is σ = 122711680. Its totient is φ = 55219320.

The previous prime is 83891597. The next prime is 83891623. The reversal of 83891601 is 10619838.

It is not a de Polignac number, because 83891601 - 2² = 83891597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83891641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58285 + ... + 59706.

Almost surely, 2^83891601 is an apocalyptic number.

It is an amenable number.

83891601 is a deficient number, since it is larger than the sum of its proper divisors (38820079).

83891601 is a wasteful number, since it uses less digits than its factorization.

83891601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118076 (or 118073 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 83891601 is about 9159.2358305701. The cubic root of 83891601 is about 437.7634457937.

The spelling of 83891601 in words is "eighty-three million, eight hundred ninety-one thousand, six hundred one".